My 03 Cobra has almost 47,000 miles on the odometer and it's decision time. I can invest $10,000 and upgrade the s/c, fuel system and cooling system or sell it and buy something else. If I commit to the first option then I feel I should keep it until 100,000 miles and rebuild the engine; keeping the block and replacing everything else. This is assuming that a KB or Whipple with 17psi and a conservative tune(550-575rwhp) will get me to 100k miles. On the other hand, if I decide to buy something else, there aren't too many viable options. Some people may be willing to pay $65k for a GT500, but I am not. Even at $45k, while the GT500 is better than my 03, it is not $10k better. But that is just my opinion and it may be worth it to someone else. The Challenger is supposed to be out in 2007, but it will probably have an outrageous markup for at least a year and its too long to wait for the new Camaro, even if the SS model has the LS-7. I would greatly appreciate any input on my delimma. I have never kept a car for 50k miles,but this is the best car I have ever owned and I really don't want to give it up.